People who track, change
In a large weight-loss trial run by Kaiser Permanente's Center for Health Research, 1,685 adults followed the same program. The people who kept daily food records lost about twice as much weight as those who kept none (Hollis et al., American Journal of Preventive Medicine, 2008). The researchers pointed to a simple explanation: writing down what you eat makes you more aware of it, and awareness changes behavior.
Money works the same way. When you log a purchase, you see it, name it and put it somewhere. That small pause is often enough to make the next decision a little more deliberate.
Hollis et al., American Journal of Preventive Medicine